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PostPosted: Tue Jul 19, 2011 5:42 pm 
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Joined: Tue Jul 19, 2011 5:36 pm
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Currently running on 10-speed Campy Chorus groupset. Looking to replace rear derailleur and was wondering if anyone has tried the Campy Record 11 rear derailleur with the 13-29 10-speed cassette (I need all the help I can get on the climbs). I've done some searching here, and it sounds like it would work, but most seem to be running 11-25 or so. Also currently running on standard crankset, but looking to switch to a compact. If anyone has any experience with this, please provide your input!


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Posted: Tue Jul 19, 2011 5:42 pm 


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PostPosted: Tue Jul 19, 2011 6:49 pm 
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Location: lat 38.9677 lon 77.3366
I use a 12x29 for the really steep (20%+) but its an 11 speed cassette

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PostPosted: Tue Jul 19, 2011 7:23 pm 
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My understanding is that an 11 speed short cage rear derailleur will shift 12-29 cassette with no issues. I also think that since indexing is done in shifter that 11 spd. derailleur is compatable with 10 spd cassette. I run 07 record 10 spd. 12-29 cassette (hybrid) with compact crankset and love it.


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PostPosted: Tue Jul 19, 2011 8:21 pm 
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I have run 10-speed Record rear mech with 13-29 cassette and 50/34 cranks. No problem.

I have also run 11-speed SR rear mech with 12-29 cassette and 50/34 cranks. This also works no problem for 2010 rear mechs and later. Earlier 11-speed rear mechs need to be modified with a spare part to work with the 29-cog.


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PostPosted: Tue Jul 19, 2011 8:28 pm 
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Location: Central USA
regarding the issue of Campy 10 speed shifters/cassettee with 11 speed rear der. Myself and others have done it with no modifications necessary. According to some there is a very, very slight bit more movement with the 11 spd rear der (compared to 10 spd) for the amount of cable being pulled by the shifter - but in the end it doesn't hurt and actually may help a bit.


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PostPosted: Tue Jul 19, 2011 9:02 pm 
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Thanks so much for the replies so far. So it seems that the Record 11-speed rear mech will work with the 10-speed shifters and cassette. Is there only 1 size for the 11-speed rear mech as opposed to the short/medium/long for the 10-speed? I'm asking b/c for 13-29, it's suggested to use the medium cage, but for the Record 11, I don't see choices. Thanks.


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PostPosted: Tue Jul 19, 2011 9:06 pm 
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Location: UK & WEST AFRICA
I run a Super Record rear and front mech with a 13/29 cassette and Centaur levers. I have 50/34 on one bike and 48/33 on another. No issues at all.


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PostPosted: Tue Jul 19, 2011 9:37 pm 
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also, what chain do you guys use with that setup? 10-speed, 11-speed, narrow?


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PostPosted: Tue Jul 19, 2011 9:52 pm 
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kreative wrote:
also, what chain do you guys use with that setup? 10-speed, 11-speed, narrow?
10-speed


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PostPosted: Tue Jul 19, 2011 10:35 pm 
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KB wrote:
kreative wrote:
also, what chain do you guys use with that setup? 10-speed, 11-speed, narrow?
10-speed


I forgot to add, when I first installed that 11 rear der I didn't like the look of the minimal clearance when running a 10 speed (5.9 mm) chain on that rear der, so I used very, very thin shims on both sides of the pulleys (about .2 mm thick each) along with running some replacement bolts with a modified length to compensate.

Maybe that modification isn't necessary but at the time I was installing the der it seemed reasonable to go that way.


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PostPosted: Wed Jul 20, 2011 11:39 pm 
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Just because the shifter indexes doesn't mean that any RD will work the same. RD's have an actuation ratio that affects the amount of movment. The 11 speed RD has a slightly larger actuation ratio, but the difference is small and a little bit of overtravel is more tolerable than under travel.


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Posted: Wed Jul 20, 2011 11:39 pm 


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